Bitcoin is a decentralized P2P cryptocurrency without a central bank or single administrator; it can be sent from user to user on the P2P bitcoin network without the need for any intermediaries. All transactions are verified by network nodes through cryptography and recorded on blockchain. All members of the Bitcoin network are anonymous, no one knows their identities or contact details. Considering that the system is transparent, the network users see public wallet addresses of senders and receivers as well as the transaction amount. However, their identities and locations remain unknown.